Figure 7.

Aquatic invertebrates have more selenoproteins than terrestrial organisms. Numbers
of detected selenoproteins were plotted against the total number of available (redundant)
ESTs for organisms that are represented by more than 25,000 ESTs. Vertebrate ESTs
were excluded from this analysis due to large size of these organisms. Blue circles
correspond to aquatic and brown squares to terrestrial organisms. The difference is
statistically significant (P value is less than 2 × 10-6).